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@ARTICLE{Kbert:889762,
      author       = {Kübert, Angelika and Kuester, Emma and Götz, Miriam and
                      Dubbert, David and Eiblmeier, Monika and Werner, Christiane
                      and Rothfuss, Youri and Dubbert, Maren},
      title        = {{C}ombined experimental drought and nitrogen loading: the
                      role of species dependent leaf level control of carbon and
                      water exchange in a temperate grassland},
      journal      = {Plant biology},
      volume       = {23},
      number       = {3},
      issn         = {1438-8677},
      address      = {Oxford [u.a.]},
      publisher    = {Wiley- Blackwell},
      reportid     = {FZJ-2021-00376},
      pages        = {427-437},
      year         = {2021},
      abstract     = {Nitrogen (N) loading and extreme drought were found to
                      strongly alter biomass production, species composition,
                      carbon and water fluxes of temperate grasslands. Such
                      changes at the community level are often attributed to
                      species and functional group‐specific responses in
                      phenology and/or physiology. In a multifactorial field
                      experiment, we studied the responses of three abundant
                      grassland species (forb Centaurea jacea, grasses
                      Arrhenatherum elatius and Dactylis glomerata) to N loading
                      and extreme drought, focusing on responses in carbon and
                      water relations at the leaf level. We analyzed 1) changes in
                      bulk leaf N (uptake efficiency of additional N), 2)
                      adaptation of plant water status (leaf water potential) and
                      3) the impact on leaf carbon and water fluxes. We observed
                      more efficient N utilization in both grasses compared to C.
                      jacea. Naturally occurring summer drought impacted the plant
                      water status of all species significantly while extreme
                      drought treatment only affected water status additionally
                      during and after summer drought. C. jacea was able to
                      maintain much lower leaf water potentials compared to
                      grasses during drought. Despite these clear
                      species‐specific responses to N loading and drought in
                      bulk, species were able to maintain homeostasis of leaf
                      carbon and water fluxes. Thus, strong declines in the
                      (community) carbon sequestration observed at this site
                      during the (natural) summer drought were not related to leaf
                      physiological responses in assimilation but driven by
                      phenological adaptions of the species community: The drought
                      sensitive grasses, even though exhibiting a higher N uptake
                      efficiency, responded with a shortened life cycle to severe
                      summer drought.},
      cin          = {IBG-3},
      ddc          = {580},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {2173 - Agro-biogeosystems: controls, feedbacks and impact
                      (POF4-217)},
      pid          = {G:(DE-HGF)POF4-2173},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {33338294},
      UT           = {WOS:000611654700001},
      doi          = {10.1111/plb.13230},
      url          = {https://juser.fz-juelich.de/record/889762},
}